90029049989 has 2 divisors, whose sum is σ = 90029049990. Its totient is φ = 90029049988.

The previous prime is 90029049919. The next prime is 90029050031. The reversal of 90029049989 is 98994092009.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86889352900 + 3139697089 = 294770^2 + 56033^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90029049989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90029049919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45014524994 + 45014524995.

It is an arithmetic number, because the mean of its divisors is an integer number (45014524995).

Almost surely, 2^90029049989 is an apocalyptic number.

It is an amenable number.

90029049989 is a deficient number, since it is larger than the sum of its proper divisors (1).

90029049989 is an equidigital number, since it uses as much as digits as its factorization.

90029049989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3779136, while the sum is 59.

The spelling of 90029049989 in words is "ninety billion, twenty-nine million, forty-nine thousand, nine hundred eighty-nine".